update tutor (#2716)

* update tutor

* Capitalize "command mode ".

* Update runtime/tutor.txt

Editing mistake.

Co-authored-by: Michael Davis <mcarsondavis@gmail.com>

Co-authored-by: Michael Davis <mcarsondavis@gmail.com>

runtime/tutor.txt

@@ -43,7 +43,7 @@ _________________________________________________________________
 =                      1.2 EXITING HELIX                        =
 =================================================================
 
- 1. Type : to enter command mode. Your cursor will
+ 1. Type : to enter Command mode. Your cursor will
     move to the bottom of the screen.
  2. Type q or quit and type <ENTER> to exit Helix.
 
@@ -51,7 +51,7 @@ _________________________________________________________________
        To force quit and DISCARD these changes, type q! or quit!.
        You will learn how to save files later.
 
- To exit command mode without entering a command, type <ESC>.
+ To exit Command mode without entering a command, type <ESC>.
 
  Now, move on to the next lesson.
 
@@ -68,11 +68,13 @@ _________________________________________________________________
     delete it.
 
  --> Thhiss senttencee haass exxtra charracterss.
+     This sentence has extra characters.
 
  Once the sentence is correct, move on to the next lesson.
 
 
 
+
 =================================================================
 =                       1.4 INSERT MODE                         =
 =================================================================
@@ -131,7 +133,7 @@ _________________________________________________________________
     terminal.
  2. Open a file in Helix by running: hx FILENAME
  3. Make some edits to the file.
- 4. Type : to enter command mode.
+ 4. Type : to enter Command mode.
  5. Type w or write, and type <ENTER> to save the file.
 
  You can also type wq or write-quit to save and exit.
@@ -149,7 +151,7 @@ _________________________________________________________________
 
  * Use the h,j,k,l keys to move the cursor.
 
- * Type : to enter command mode.
+ * Type : to enter Command mode.
    * The q/quit and q!/quit! commands will exit Helix. The
      former fails when there are unsaved changes. The latter
      discards them.
@@ -184,7 +186,7 @@ _________________________________________________________________
  5. Repeat for all extra words in the line.
 
  --> This sentence pencil has vacuum extra words in the it.
-
+     This sentence has extra words in it.
 
 
 =================================================================
@@ -349,7 +351,7 @@ _________________________________________________________________
  6. Type , to remove the second cursor.
 
  --> I like to eat apples since my favorite fruit is apples.
-
+     I like to eat oranges since my favourite fruit is oranges.
 
 
 =================================================================
@@ -365,6 +367,7 @@ _________________________________________________________________
  4. Type c and change the matches to single spaces.
 
  --> This  sentence has   some      extra spaces.
+     This sentence has some extra spaces.
 
  Note: If you want to perform find-and-replace, the select
        command is the way to do it. Select the text you want
@@ -582,12 +585,14 @@ _________________________________________________________________
  Type J to join together lines in selection.
 
  1. Move the cursor to the line below marked -->.
- 2. Type J thrice or 3J to join the sentence to one line.
+ 2. Type x four times or 4x to select all four lines.
+ 3. Type J to join the lines together.
 
- --> This line sentence
+ --> This sentence
 is spilling over
 onto other
 lines.
+     This sentence is spilling over onto other lines.
 
  Note: J works on all lines in selection, so typing xxx or 3x to
        select the lines and then a single J will work the same.